How many cars on the lot have at least three options

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Question: Seventy cars sit on a parking lot. Thirty have stereo systems, 30 have air conditioners and 40 have sun roofs. Thirty of the cars have at least two of these three options and 10 have all three. How many cars on the lot have at least one of these three options? How many have exactly one?

Reference no: EM131569291

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